load “#{MRUBY_ROOT}/tasks/mruby_build_gem.rake” load “#{MRUBY_ROOT}/tasks/mruby_build_commands.rake”

module MRuby

class << self
  def targets
    @targets ||= {}
  end

  def each_target(&block)
    @targets.each do |key, target|
      target.instance_eval(&block)
    end
  end
end

class Toolchain
  class << self
    attr_accessor :toolchains
  end

  def initialize(name, &block)
    @name, @initializer = name.to_s, block
    MRuby::Toolchain.toolchains ||= {}
    MRuby::Toolchain.toolchains[@name] = self
  end

  def setup(conf)
    conf.instance_eval(&@initializer)
  end

  def self.load
    Dir.glob("#{MRUBY_ROOT}/tasks/toolchains/*.rake").each do |file|
      Kernel.load file
    end
  end
end
Toolchain.load

class Build
  class << self
    attr_accessor :current
  end
  include Rake::DSL
  include LoadGems
  attr_accessor :name, :bins, :exts, :file_separator, :build_dir, :gem_clone_dir
  attr_reader :libmruby, :gems, :toolchains
  attr_writer :enable_bintest

  COMPILERS = %w(cc cxx objc asm)
  COMMANDS = COMPILERS + %w(linker archiver yacc gperf git exts mrbc)
  attr_block MRuby::Build::COMMANDS

  Exts = Struct.new(:object, :executable, :library)

  def initialize(name='host', build_dir=nil, &block)
    @name = name.to_s

    unless MRuby.targets[@name]
      if ENV['OS'] == 'Windows_NT'
        @exts = Exts.new('.o', '.exe', '.a')
      else
        @exts = Exts.new('.o', '', '.a')
      end

      build_dir = build_dir || ENV['MRUBY_BUILD_DIR'] || "#{MRUBY_ROOT}/build"

      @file_separator = '/'
      @build_dir = "#{build_dir}/#{@name}"
      @gem_clone_dir = "#{build_dir}/mrbgems"
      @cc = Command::Compiler.new(self, %w(.c))
      @cxx = Command::Compiler.new(self, %w(.cc .cxx .cpp))
      @objc = Command::Compiler.new(self, %w(.m))
      @asm = Command::Compiler.new(self, %w(.S .asm))
      @linker = Command::Linker.new(self)
      @archiver = Command::Archiver.new(self)
      @yacc = Command::Yacc.new(self)
      @gperf = Command::Gperf.new(self)
      @git = Command::Git.new(self)
      @mrbc = Command::Mrbc.new(self)

      @bins = %w(mrbc)
      @gems, @libmruby = MRuby::Gem::List.new, []
      @build_mrbtest_lib_only = false
      @cxx_abi_enabled = false
      @cxx_exception_disabled = false
      @toolchains = []

      MRuby.targets[@name] = self
    end

    MRuby::Build.current = MRuby.targets[@name]
    MRuby.targets[@name].instance_eval(&block)
  end

  def enable_debug
    compilers.each { |c| c.defines += %w(MRB_DEBUG) }
    @mrbc.compile_options += ' -g'
  end

  def disable_cxx_exception
    @cxx_exception_disabled = true
  end

  def cxx_abi_enabled?
    @cxx_abi_enabled
  end

  def enable_cxx_abi
    return if @cxx_exception_disabled or @cxx_abi_enabled
    compilers.each { |c| c.defines += %w(MRB_ENABLE_CXX_EXCEPTION) }
    linker.command = cxx.command if toolchains.find { |v| v == 'gcc' }
    @cxx_abi_enabled = true
  end

  def enable_bintest
    @enable_bintest = true
  end

  def bintest_enabled?
    @enable_bintest
  end

  def toolchain(name)
    tc = Toolchain.toolchains[name.to_s]
    fail "Unknown #{name} toolchain" unless tc
    tc.setup(self)
    @toolchains.unshift name.to_s
  end

  def primary_toolchain
    @toolchains.first
  end

  def root
    MRUBY_ROOT
  end

  def mrbcfile
    MRuby.targets[@name].exefile("#{MRuby.targets[@name].build_dir}/bin/mrbc")
  end

  def compilers
    COMPILERS.map do |c|
      instance_variable_get("@#{c}")
    end
  end

  def define_rules
    compilers.each do |compiler|
      if respond_to?(:enable_gems?) && enable_gems?
        compiler.defines -= %w(DISABLE_GEMS)
      else
        compiler.defines += %w(DISABLE_GEMS)
      end
      compiler.define_rules build_dir, File.expand_path(File.join(File.dirname(__FILE__), '..'))
    end
  end

  def filename(name)
    if name.is_a?(Array)
      name.flatten.map { |n| filename(n) }
    else
      '"%s"' % name.gsub('/', file_separator)
    end
  end

  def cygwin_filename(name)
    if name.is_a?(Array)
      name.flatten.map { |n| cygwin_filename(n) }
    else
      '"%s"' % %xcygpath -w "#{filename(name)}"`.strip
    end
  end

  def exefile(name)
    if name.is_a?(Array)
      name.flatten.map { |n| exefile(n) }
    else
      "#{name}#{exts.executable}"
    end
  end

  def objfile(name)
    if name.is_a?(Array)
      name.flatten.map { |n| objfile(n) }
    else
      "#{name}#{exts.object}"
    end
  end

  def libfile(name)
    if name.is_a?(Array)
      name.flatten.map { |n| libfile(n) }
    else
      "#{name}#{exts.library}"
    end
  end

  def build_mrbtest_lib_only
    @build_mrbtest_lib_only = true
  end

  def build_mrbtest_lib_only?
    @build_mrbtest_lib_only
  end

  def run_test
    puts ">>> Test #{name} <<<"
    mrbtest = exefile("#{build_dir}/test/mrbtest")
    sh "#{filename mrbtest.relative_path}#{$verbose ? ' -v' : ''}"
    puts
    run_bintest if @enable_bintest
  end

  def run_bintest
    targets = @gems.select { |v| File.directory? "#{v.dir}/bintest" }.map { |v| filename v.dir }
    targets << filename(".") if File.directory? "./bintest"
    sh "ruby test/bintest.rb #{targets.join ' '}"
  end

  def print_build_summary
    puts "================================================"
    puts "      Config Name: #{@name}"
    puts " Output Directory: #{self.build_dir.relative_path}"
    puts "         Binaries: #{@bins.join(', ')}" unless @bins.empty?
    unless @gems.empty?
      puts "    Included Gems:"
      @gems.map do |gem|
        gem_version = " - #{gem.version}" if gem.version != '0.0.0'
        gem_summary = " - #{gem.summary}" if gem.summary
        puts "             #{gem.name}#{gem_version}#{gem_summary}"
        puts "               - Binaries: #{gem.bins.join(', ')}" unless gem.bins.empty?
      end
    end
    puts "================================================"
    puts
  end
end # Build

class CrossBuild < Build
  attr_block %w(test_runner)

  def initialize(name, build_dir=nil, &block)
    @test_runner = Command::CrossTestRunner.new(self)
    super
  end

  def mrbcfile
    MRuby.targets['host'].exefile("#{MRuby.targets['host'].build_dir}/bin/mrbc")
  end

  def run_test
    mrbtest = exefile("#{build_dir}/test/mrbtest")
    if (@test_runner.command == nil)
      puts "You should run #{mrbtest} on target device."
      puts
    else
      @test_runner.run(mrbtest)
    end
  end
end # CrossBuild

end # MRuby

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